Cisco Collaboration Sizing Guide - Collaboration Sizing Guide for CSR 14

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/solutions/PA/size/SRND_sizing14/sizing14.html

Published

2021-05-25

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco copyright; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• The maximum number of media streams Unified CM can send for call queuing is the same as the Music On Hold stream limit. in context
• In more advanced configurations, the SME can also host centralized voice messaging, mobility and conferencing services. in context
• In a base configuration, the SME also provides centralized PSTN access for all the leaf clusters connected to it. in context
• Cisco measures SME performance in calls per second across each pair of protocols, and the figure varies by hardware platform and software version. in context
• Cisco describes Session Management Edition as Unified CM operating in a specific deployment mode. in context
• An SME cluster uses the same topology as a regular Unified CM cluster, with a publisher node holding the master configuration repository. in context
• In a pure SME deployment, calls traverse only trunk interfaces and the SME hosts no line interfaces. in context
• Cisco recommends a 1:1 redundancy ratio for call processing subscribers in an SME cluster. in context
• In current documentation SME is a deployment role of Unified CM software rather than a separate product line with its own release train. inferred in context
• In a base configuration, the SME is a routing aggregation point for a number of leaf clusters. in context
• If the SME is a service aggregation point, sizing must also consider the share of calls to centralized voice messaging, the number of mobility users and conferencing load. in context
• SME is sized with the SME sizing tool, whose inputs include the SIP trunks the cluster serves, users reaching SME over trunks, per-user intercluster and PSTN BHCA, PSTN trunks, average call holding time, and route and translation pattern counts. in context

Cite this source record

APA

WarmTransfer. (2021, May 25). Cisco Collaboration Sizing Guide - Collaboration Sizing Guide for CSR 14. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-sizing-guide-csr-14

BibTeX

@misc{warmtransfer-cisco-sizing-guide-csr-14,
  title  = {Cisco Collaboration Sizing Guide - Collaboration Sizing Guide for CSR 14},
  author = {{WarmTransfer}},
  year   = {2021},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-sizing-guide-csr-14},
  note   = {Cisco Systems, accessed 2026-09-24}
}